1011211221042 has 64 divisors (see below), whose sum is σ = 2492970739200. Its totient is φ = 301233943440.

The previous prime is 1011211221019. The next prime is 1011211221043. The reversal of 1011211221042 is 2401221121101.

1011211221042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1011211221042² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1011211221043) 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, 14391868 + ... + 14461959.

It is an arithmetic number, because the mean of its divisors is an integer number (38952667800).

Almost surely, 2^{1011211221042} is an apocalyptic number.

1011211221042 is an abundant number, since it is smaller than the sum of its proper divisors (1481759518158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1011211221042 is a wasteful number, since it uses less digits than its factorization.

1011211221042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28853908 (or 28853902 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1011211221042 its reverse (2401221121101), we get a palindrome (3412432342143).

The spelling of 1011211221042 in words is "one trillion, eleven billion, two hundred eleven million, two hundred twenty-one thousand, forty-two".