1021220022011 has 6 divisors (see below), whose sum is σ = 1187949821580. Its totient is φ = 875331447396.

The previous prime is 1021220021947. The next prime is 1021220022019. The reversal of 1021220022011 is 1102200221201.

It is not a de Polignac number, because 1021220022011 - 2⁶ = 1021220021947 is a prime.

It is a super-2 number, since 2×1021220022011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021220022019) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10420612421 + ... + 10420612518.

It is an arithmetic number, because the mean of its divisors is an integer number (197991636930).

Almost surely, 2^{1021220022011} is an apocalyptic number.

1021220022011 is a deficient number, since it is larger than the sum of its proper divisors (166729799569).

1021220022011 is an equidigital number, since it uses as much as digits as its factorization.

1021220022011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20841224953 (or 20841224946 counting only the distinct ones).

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

Adding to 1021220022011 its reverse (1102200221201), we get a palindrome (2123420243212).

The spelling of 1021220022011 in words is "one trillion, twenty-one billion, two hundred twenty million, twenty-two thousand, eleven".