121534521310 has 16 divisors (see below), whose sum is σ = 218783242800. Its totient is φ = 48609118656.

The previous prime is 121534521271. The next prime is 121534521337. The reversal of 121534521310 is 13125435121.

It is a super-2 number, since 2×121534521310² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476415 + ... + 685594.

It is an arithmetic number, because the mean of its divisors is an integer number (13673952675).

Almost surely, 2^121534521310 is an apocalyptic number.

121534521310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121534521310 is a deficient number, since it is larger than the sum of its proper divisors (97248721490).

121534521310 is a wasteful number, since it uses less digits than its factorization.

121534521310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172475.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 121534521310 its reverse (13125435121), we get a palindrome (134659956431).

The spelling of 121534521310 in words is "one hundred twenty-one billion, five hundred thirty-four million, five hundred twenty-one thousand, three hundred ten".