2221121220212 has 12 divisors (see below), whose sum is σ = 3904392460416. Its totient is φ = 1105580517240.

The previous prime is 2221121220167. The next prime is 2221121220257. The reversal of 2221121220212 is 2120221211222.

It is an interprime number because it is at equal distance from previous prime (2221121220167) and next prime (2221121220257).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1245022214 + ... + 1245023997.

It is an arithmetic number, because the mean of its divisors is an integer number (325366038368).

Almost surely, 2^{2221121220212} is an apocalyptic number.

It is an amenable number.

2221121220212 is a deficient number, since it is larger than the sum of its proper divisors (1683271240204).

2221121220212 is a wasteful number, since it uses less digits than its factorization.

2221121220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2490046438 (or 2490046436 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 2221121220212 its reverse (2120221211222), we get a palindrome (4341342431434).

The spelling of 2221121220212 in words is "two trillion, two hundred twenty-one billion, one hundred twenty-one million, two hundred twenty thousand, two hundred twelve".