1211010222021 has 12 divisors (see below), whose sum is σ = 1715248620192. Its totient is φ = 759849550528.

The previous prime is 1211010222013. The next prime is 1211010222029. The reversal of 1211010222021 is 1202220101121.

It is an interprime number because it is at equal distance from previous prime (1211010222013) and next prime (1211010222029).

It is not a de Polignac number, because 1211010222021 - 2³ = 1211010222013 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211010222029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 698390265 + ... + 698391998.

It is an arithmetic number, because the mean of its divisors is an integer number (142937385016).

Almost surely, 2^{1211010222021} is an apocalyptic number.

It is an amenable number.

1211010222021 is a deficient number, since it is larger than the sum of its proper divisors (504238398171).

1211010222021 is a wasteful number, since it uses less digits than its factorization.

1211010222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396782300 (or 1396782283 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1211010222021 its reverse (1202220101121), we get a palindrome (2413230323142).

The spelling of 1211010222021 in words is "one trillion, two hundred eleven billion, ten million, two hundred twenty-two thousand, twenty-one".