121010101212 has 384 divisors, whose sum is σ = 401960337408. Its totient is φ = 27315532800.

The previous prime is 121010101189. The next prime is 121010101229. The reversal of 121010101212 is 212101010121.

121010101212 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 13773373 + ... + 13782155.

It is an arithmetic number, because the mean of its divisors is an integer number (1046771712).

Almost surely, 2^121010101212 is an apocalyptic number.

121010101212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121010101212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200980168704).

121010101212 is an abundant number, since it is smaller than the sum of its proper divisors (280950236196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121010101212 is a wasteful number, since it uses less digits than its factorization.

121010101212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8889 (or 8887 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121010101212 its reverse (212101010121), we get a palindrome (333111111333).

It can be divided in two parts, 12101010121 and 2, that multiplied together give a palindrome (24202020242).

The spelling of 121010101212 in words is "one hundred twenty-one billion, ten million, one hundred one thousand, two hundred twelve".