2111211020042 has 16 divisors (see below), whose sum is σ = 3236514636264. Its totient is φ = 1032564024000.

The previous prime is 2111211020041. The next prime is 2111211020047. The reversal of 2111211020042 is 2400201121112.

It can be written as a sum of positive squares in 4 ways, for example, as 887158655881 + 1224052364161 = 941891^2 + 1106369^2 .

It is a super-2 number, since 2×2111211020042² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2111211020042.

It is not an unprimeable number, because it can be changed into a prime (2111211020041) 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, 47781809 + ... + 47825972.

Almost surely, 2^{2111211020042} is an apocalyptic number.

2111211020042 is a deficient number, since it is larger than the sum of its proper divisors (1125303616222).

2111211020042 is a wasteful number, since it uses less digits than its factorization.

2111211020042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95608025.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2111211020042 its reverse (2400201121112), we get a palindrome (4511412141154).

The spelling of 2111211020042 in words is "two trillion, one hundred eleven billion, two hundred eleven million, twenty thousand, forty-two".