1220201102021 has 32 divisors (see below), whose sum is σ = 1471267058688. Its totient is φ = 998251626240.

The previous prime is 1220201101993. The next prime is 1220201102041. The reversal of 1220201102021 is 1202011020221.

It is not a de Polignac number, because 1220201102021 - 2¹⁰ = 1220201100997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220201101987 and 1220201102005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220201102041) 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, 11590406 + ... + 11695208.

It is an arithmetic number, because the mean of its divisors is an integer number (45977095584).

Almost surely, 2^{1220201102021} is an apocalyptic number.

1220201102021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220201102021 is a deficient number, since it is larger than the sum of its proper divisors (251065956667).

1220201102021 is a wasteful number, since it uses less digits than its factorization.

1220201102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107561.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1220201102021 its reverse (1202011020221), we get a palindrome (2422212122242).

It can be divided in two parts, 1 and 220201102021, that added together give a palindrome (220201102022).

The spelling of 1220201102021 in words is "one trillion, two hundred twenty billion, two hundred one million, one hundred two thousand, twenty-one".