121211002110 has 128 divisors (see below), whose sum is σ = 340101172224. Its totient is φ = 27347189760.

The previous prime is 121211002091. The next prime is 121211002117. The reversal of 121211002110 is 11200112121.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121211002117) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 65022 + ... + 496638.

It is an arithmetic number, because the mean of its divisors is an integer number (2657040408).

Almost surely, 2^121211002110 is an apocalyptic number.

121211002110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121211002110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170050586112).

121211002110 is an abundant number, since it is smaller than the sum of its proper divisors (218890170114).

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

121211002110 is a wasteful number, since it uses less digits than its factorization.

121211002110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431698.

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

Adding to 121211002110 its reverse (11200112121), we get a palindrome (132411114231).

The spelling of 121211002110 in words is "one hundred twenty-one billion, two hundred eleven million, two thousand, one hundred ten".