1220011101021 has 16 divisors (see below), whose sum is σ = 1630654588800. Its totient is φ = 811354434240.

The previous prime is 1220011100939. The next prime is 1220011101061. The reversal of 1220011101021 is 1201011100221.

It is not a de Polignac number, because 1220011101021 - 2⁹ = 1220011100509 is a prime.

It is a super-2 number, since 2×1220011101021² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220011100988 and 1220011101006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220011101061) 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, 29448880 + ... + 29490278.

It is an arithmetic number, because the mean of its divisors is an integer number (101915911800).

Almost surely, 2^{1220011101021} is an apocalyptic number.

It is an amenable number.

1220011101021 is a deficient number, since it is larger than the sum of its proper divisors (410643487779).

1220011101021 is a wasteful number, since it uses less digits than its factorization.

1220011101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65156.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1220011101021 its reverse (1201011100221), we get a palindrome (2421022201242).

The spelling of 1220011101021 in words is "one trillion, two hundred twenty billion, eleven million, one hundred one thousand, twenty-one".