121520434350 has 48 divisors (see below), whose sum is σ = 344423634048. Its totient is φ = 27776099040.

The previous prime is 121520434313. The next prime is 121520434369. The reversal of 121520434350 is 53434025121.

It is a super-2 number, since 2×121520434350² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57865824 + ... + 57867923.

It is an arithmetic number, because the mean of its divisors is an integer number (7175492376).

Almost surely, 2^121520434350 is an apocalyptic number.

121520434350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121520434350 is an abundant number, since it is smaller than the sum of its proper divisors (222903199698).

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

121520434350 is a wasteful number, since it uses less digits than its factorization.

121520434350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115733769 (or 115733764 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 121520434350 its reverse (53434025121), we get a palindrome (174954459471).

The spelling of 121520434350 in words is "one hundred twenty-one billion, five hundred twenty million, four hundred thirty-four thousand, three hundred fifty".