1211000422031 has 12 divisors (see below), whose sum is σ = 1286466055032. Its totient is φ = 1139729662848.

The previous prime is 1211000422013. The next prime is 1211000422063. The reversal of 1211000422031 is 1302240001121.

It is a de Polignac number, because none of the positive numbers 2^k-1211000422031 is a prime.

It is a super-2 number, since 2×1211000422031² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211000422081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16668821 + ... + 16741313.

It is an arithmetic number, because the mean of its divisors is an integer number (107205504586).

Almost surely, 2^{1211000422031} is an apocalyptic number.

1211000422031 is a deficient number, since it is larger than the sum of its proper divisors (75465633001).

1211000422031 is an equidigital number, since it uses as much as digits as its factorization.

1211000422031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130330 (or 130313 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1211000422031 its reverse (1302240001121), we get a palindrome (2513240423152).

The spelling of 1211000422031 in words is "one trillion, two hundred eleven billion, four hundred twenty-two thousand, thirty-one".