213121102 has 16 divisors (see below), whose sum is σ = 323326080. Its totient is φ = 105350008.

The previous prime is 213121093. The next prime is 213121123. The reversal of 213121102 is 201121312.

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, 178953 + ... + 180139.

It is an arithmetic number, because the mean of its divisors is an integer number (20207880).

Almost surely, 2^213121102 is an apocalyptic number.

213121102 is a deficient number, since it is larger than the sum of its proper divisors (110204978).

213121102 is a wasteful number, since it uses less digits than its factorization.

213121102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2135.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 213121102 is about 14598.6678159344. The cubic root of 213121102 is about 597.3224224424.

Adding to 213121102 its reverse (201121312), we get a palindrome (414242414).

The spelling of 213121102 in words is "two hundred thirteen million, one hundred twenty-one thousand, one hundred two".