211101021021 has 16 divisors (see below), whose sum is σ = 307126843200. Its totient is φ = 127910507520.

The previous prime is 211101020981. The next prime is 211101021029. The reversal of 211101021021 is 120120101112.

It is a de Polignac number, because none of the positive numbers 2^k-211101021021 is a prime.

It is a super-2 number, since 2×211101021021² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211101020988 and 211101021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211101021029) 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, 591940 + ... + 878973.

It is an arithmetic number, because the mean of its divisors is an integer number (19195427700).

Almost surely, 2^211101021021 is an apocalyptic number.

It is an amenable number.

211101021021 is a deficient number, since it is larger than the sum of its proper divisors (96025822179).

211101021021 is a wasteful number, since it uses less digits than its factorization.

211101021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475276.

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

Adding to 211101021021 its reverse (120120101112), we get a palindrome (331221122133).

The spelling of 211101021021 in words is "two hundred eleven billion, one hundred one million, twenty-one thousand, twenty-one".