1220201101021 has 16 divisors (see below), whose sum is σ = 1395376245760. Its totient is φ = 1045241366400.

The previous prime is 1220201101019. The next prime is 1220201101027. The reversal of 1220201101021 is 1201011020221.

It is not a de Polignac number, because 1220201101021 - 2¹ = 1220201101019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220201100992 and 1220201101010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220201101027) 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, 105630196 + ... + 105641746.

It is an arithmetic number, because the mean of its divisors is an integer number (87211015360).

Almost surely, 2^{1220201101021} is an apocalyptic number.

It is an amenable number.

1220201101021 is a deficient number, since it is larger than the sum of its proper divisors (175175144739).

1220201101021 is a wasteful number, since it uses less digits than its factorization.

1220201101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19564.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1220201101021 its reverse (1201011020221), we get a palindrome (2421212121242).

The spelling of 1220201101021 in words is "one trillion, two hundred twenty billion, two hundred one million, one hundred one thousand, twenty-one".