1220311010021 has 8 divisors (see below), whose sum is σ = 1286477497344. Its totient is φ = 1155819623760.

The previous prime is 1220311010003. The next prime is 1220311010059. The reversal of 1220311010021 is 1200101130221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220311010021 is a prime.

It is a super-2 number, since 2×1220311010021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220311009978 and 1220311010005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220311016021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 418773770 + ... + 418776683.

It is an arithmetic number, because the mean of its divisors is an integer number (160809687168).

Almost surely, 2^{1220311010021} is an apocalyptic number.

It is an amenable number.

1220311010021 is a deficient number, since it is larger than the sum of its proper divisors (66166487323).

1220311010021 is an equidigital number, since it uses as much as digits as its factorization.

1220311010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837550531.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 1220311010021 its reverse (1200101130221), we get a palindrome (2420412140242).

The spelling of 1220311010021 in words is "one trillion, two hundred twenty billion, three hundred eleven million, ten thousand, twenty-one".