1220101120021 has 8 divisors (see below), whose sum is σ = 1394432885504. Its totient is φ = 1045777255920.

The previous prime is 1220101120019. The next prime is 1220101120081. The reversal of 1220101120021 is 1200211010221.

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

It is a cyclic number.

It is not a de Polignac number, because 1220101120021 - 2¹ = 1220101120019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220101119983 and 1220101120010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220101120081) 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, 1640670 + ... + 2265391.

It is an arithmetic number, because the mean of its divisors is an integer number (174304110688).

Almost surely, 2^{1220101120021} is an apocalyptic number.

It is an amenable number.

1220101120021 is a deficient number, since it is larger than the sum of its proper divisors (174331765483).

1220101120021 is an equidigital number, since it uses as much as digits as its factorization.

1220101120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3950691.

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

Adding to 1220101120021 its reverse (1200211010221), we get a palindrome (2420312130242).

The spelling of 1220101120021 in words is "one trillion, two hundred twenty billion, one hundred one million, one hundred twenty thousand, twenty-one".