121401525102 has 32 divisors (see below), whose sum is σ = 285251137920. Its totient is φ = 33958468320.

The previous prime is 121401525097. The next prime is 121401525109. The reversal of 121401525102 is 201525104121.

It is a happy number.

It is a super-2 number, since 2×121401525102² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121401525109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70745952 + ... + 70747667.

It is an arithmetic number, because the mean of its divisors is an integer number (8914098060).

Almost surely, 2^121401525102 is an apocalyptic number.

121401525102 is an abundant number, since it is smaller than the sum of its proper divisors (163849612818).

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

121401525102 is a wasteful number, since it uses less digits than its factorization.

121401525102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141493648.

The product of its (nonzero) digits is 800, while the sum is 24.

Adding to 121401525102 its reverse (201525104121), we get a palindrome (322926629223).

The spelling of 121401525102 in words is "one hundred twenty-one billion, four hundred one million, five hundred twenty-five thousand, one hundred two".