1211011112021 has 8 divisors (see below), whose sum is σ = 1211582898240. Its totient is φ = 1210439469312.

The previous prime is 1211011111991. The next prime is 1211011112023. The reversal of 1211011112021 is 1202111101121.

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 1211011112021 - 2⁶ = 1211011111957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211011111987 and 1211011112005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211011112023) 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, 19196096 + ... + 19259078.

It is an arithmetic number, because the mean of its divisors is an integer number (151447862280).

Almost surely, 2^{1211011112021} is an apocalyptic number.

It is an amenable number.

1211011112021 is a deficient number, since it is larger than the sum of its proper divisors (571786219).

1211011112021 is an equidigital number, since it uses as much as digits as its factorization.

1211011112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71755.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1211011112021 its reverse (1202111101121), we get a palindrome (2413122213142).

The spelling of 1211011112021 in words is "one trillion, two hundred eleven billion, eleven million, one hundred twelve thousand, twenty-one".