121222212021212 has 48 divisors (see below), whose sum is σ = 222597932397120. Its totient is φ = 57653045041152.

The previous prime is 121222212021133. The next prime is 121222212021299. The reversal of 121222212021212 is 212120212222121.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8298668 + ... + 17644044.

It is an arithmetic number, because the mean of its divisors is an integer number (4637456924940).

Almost surely, 2^{121222212021212} is an apocalyptic number.

It is an amenable number.

121222212021212 is a deficient number, since it is larger than the sum of its proper divisors (101375720375908).

121222212021212 is a wasteful number, since it uses less digits than its factorization.

121222212021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9346190 (or 9346188 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 121222212021212 its reverse (212120212222121), we get a palindrome (333342424243333).

The spelling of 121222212021212 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, two hundred twelve million, twenty-one thousand, two hundred twelve".