222212210012121 has 16 divisors (see below), whose sum is σ = 347760678733184. Its totient is φ = 123546556917504.

The previous prime is 222212210012069. The next prime is 222212210012123. The reversal of 222212210012121 is 121210012212222.

It is not a de Polignac number, because 222212210012121 - 2⁶ = 222212210012057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222212210012123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142993699360 + ... + 142993700913.

It is an arithmetic number, because the mean of its divisors is an integer number (21735042420824).

Almost surely, 2^{222212210012121} is an apocalyptic number.

222212210012121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

222212210012121 is a deficient number, since it is larger than the sum of its proper divisors (125548468721063).

222212210012121 is a wasteful number, since it uses less digits than its factorization.

222212210012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285987400320.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 222212210012121 its reverse (121210012212222), we get a palindrome (343422222224343).

The spelling of 222212210012121 in words is "two hundred twenty-two trillion, two hundred twelve billion, two hundred ten million, twelve thousand, one hundred twenty-one".