121210001010 has 72 divisors (see below), whose sum is σ = 366598424556. Its totient is φ = 27705142080.

The previous prime is 121210000999. The next prime is 121210001027. The reversal of 121210001010 is 10100012121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 120076803441 + 1133197569 = 346521^2 + 33663^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 121210000983 and 121210001001.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 13738221 + ... + 13747040.

Almost surely, 2^121210001010 is an apocalyptic number.

121210001010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121210001010 is an abundant number, since it is smaller than the sum of its proper divisors (245388423546).

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

121210001010 is a wasteful number, since it uses less digits than its factorization.

121210001010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27485288 (or 27485278 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 121210001010 its reverse (10100012121), we get a palindrome (131310013131).

The spelling of 121210001010 in words is "one hundred twenty-one billion, two hundred ten million, one thousand, ten".