2101210212111 has 32 divisors (see below), whose sum is σ = 2865711701760. Its totient is φ = 1369055001600.

The previous prime is 2101210212107. The next prime is 2101210212119. The reversal of 2101210212111 is 1112120121012.

It is a happy number.

It is not a de Polignac number, because 2101210212111 - 2² = 2101210212107 is a prime.

It is a super-2 number, since 2×2101210212111² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101210212119) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 199520916 + ... + 199531446.

It is an arithmetic number, because the mean of its divisors is an integer number (89553490680).

Almost surely, 2^{2101210212111} is an apocalyptic number.

2101210212111 is a deficient number, since it is larger than the sum of its proper divisors (764501489649).

2101210212111 is a wasteful number, since it uses less digits than its factorization.

2101210212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17447.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2101210212111 its reverse (1112120121012), we get a palindrome (3213330333123).

The spelling of 2101210212111 in words is "two trillion, one hundred one billion, two hundred ten million, two hundred twelve thousand, one hundred eleven".