1220212101021 has 32 divisors (see below), whose sum is σ = 1782716335488. Its totient is φ = 739244113920.

The previous prime is 1220212101019. The next prime is 1220212101029. The reversal of 1220212101021 is 1201012120221.

It is not a de Polignac number, because 1220212101021 - 2¹ = 1220212101019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220212101029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2220900 + ... + 2715293.

It is an arithmetic number, because the mean of its divisors is an integer number (55709885484).

Almost surely, 2^{1220212101021} is an apocalyptic number.

It is an amenable number.

1220212101021 is a deficient number, since it is larger than the sum of its proper divisors (562504234467).

1220212101021 is a wasteful number, since it uses less digits than its factorization.

1220212101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4936381.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1220212101021 its reverse (1201012120221), we get a palindrome (2421224221242).

The spelling of 1220212101021 in words is "one trillion, two hundred twenty billion, two hundred twelve million, one hundred one thousand, twenty-one".