121616213210 has 16 divisors (see below), whose sum is σ = 219124029600. Its totient is φ = 48598741776.

The previous prime is 121616213203. The next prime is 121616213237. The reversal of 121616213210 is 12312616121.

It is a self number, because there is not a number n which added to its sum of digits gives 121616213210.

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, 5957240 + ... + 5977619.

It is an arithmetic number, because the mean of its divisors is an integer number (13695251850).

Almost surely, 2^121616213210 is an apocalyptic number.

121616213210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121616213210 is a deficient number, since it is larger than the sum of its proper divisors (97507816390).

121616213210 is a wasteful number, since it uses less digits than its factorization.

121616213210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11935885.

The product of its (nonzero) digits is 864, while the sum is 26.

Adding to 121616213210 its reverse (12312616121), we get a palindrome (133928829331).

The spelling of 121616213210 in words is "one hundred twenty-one billion, six hundred sixteen million, two hundred thirteen thousand, two hundred ten".